SpringCloud-Ribbon[入门案例]

#!/bin/bash
 
cd `dirname $0`
 
CUR_SHELL_DIR=`pwd`
CUR_SHELL_NAME=`basename ${BASH_SOURCE}`
 
JAR_NAME="springcloud-eureka-ribbon-provider-0.0.1-SNAPSHOT.jar"
JAR_PATH=$CUR_SHELL_DIR/$JAR_NAME
 
#JAVA_MEM_OPTS=" -server -Xms1024m -Xmx1024m -XX:PermSize=128m"
JAVA_MEM_OPTS=""
 
#SPRING_PROFILES_ACTIV="-Dspring.profiles.active=配置文件变量名称"
SPRING_PROFILES_ACTIV=""
LOG_DIR=$CUR_SHELL_DIR/logs
LOG_PATH=$LOG_DIR/${JAR_NAME%..log
 
echo_help()
{
    echo -e "syntax: sh $CUR_SHELL_NAME start|stop"
}
 
if [ -z $1 ];then
    echo_help
    exit 1
fi
 
if [ ! -d "$LOG_DIR" ];then
    mkdir "$LOG_DIR"
fi
 
if [ ! -f "$LOG_PATH" ];then
    touch "$LOG_DIR"
fi
 
if [ "$1" == "start" ];then
 
    # check server
    PIDS=`ps --no-heading -C java -f --width 1000 | grep $JAR_NAME | awk '{print $2}'`
    if [ -n "$PIDS" ]; then
        echo -e "ERROR: The $JAR_NAME already started and the PID is ${PIDS}."
        exit 1
    fi
 
    echo "Starting the $JAR_NAME..."
 
    # start
    nohup java $JAVA_MEM_OPTS -jar $SPRING_PROFILES_ACTIV $JAR_PATH >> $LOG_PATH 2>&1 &
 
    COUNT=0
    while [ $COUNT -lt 1 ]; do
        sleep 1
        COUNT=`ps  --no-heading -C java -f --width 1000 | grep "$JAR_NAME" | awk '{print $2}' | wc -l`
        if [ $COUNT -gt 0 ]; then
            break
        fi
    done
    PIDS=`ps  --no-heading -C java -f --width 1000 | grep "$JAR_NAME" | awk '{print $2}'`
    echo "${JAR_NAME} Started and the PID is ${PIDS}."
    echo "You can check the log file in ${LOG_PATH} for details."
 
elif [ "$1" == "stop" ];then
 
    PIDS=`ps --no-heading -C java -f --width 1000 | grep $JAR_NAME | awk '{print $2}'`
    if [ -z "$PIDS" ]; then
        echo "ERROR:The $JAR_NAME does not started!"
        exit 1
    fi
 
    echo -e "Stopping the $JAR_NAME..."
 
    for PID in $PIDS; do
        kill $PID > /dev/null 2>&1
    done
 
    COUNT=0
    while [ $COUNT -lt 1 ]; do
        sleep 1
        COUNT=1
        for PID in $PIDS ; do
            PID_EXIST=`ps --no-heading -p $PID`
            if [ -n "$PID_EXIST" ]; then
                COUNT=0
                break
            fi
        done
    done
 
    echo -e "${JAR_NAME} Stopped and the PID is ${PIDS}."
else
    echo_help
    exit 1
fi

chmod 755 service.sh

./service start

/**
 * @program: springcloud-eureka-consumer
 * @description: 用户的业务处理
 * @author: 波波烤鸭
 * @create: 2019-05-28 17:43
 */
@Service
public class UserService {

    /**
     * ribbon 负载均衡
     *    LoadBalancerClient 通过服务名称可以获取对应的服务的相关信息 ip port等
     */
    @Autowired
   private LoadBalancerClient loadBalancerClient;

    public List<User> getUsers(){
        // ServiceInstance 封装的有服务的基本信息  IP和端口等
        ServiceInstance si = this.loadBalancerClient.choose("eureka-ribbon-provider");
        StringBuilder sb = new StringBuilder();
        sb.append("http://")
                .append(si.getHost())
                .append(":")
                .append(si.getPort())
                .append("/user");
        System.out.println("服务地址:"+sb.toString());
        // SpringMVC RestTemplate
        RestTemplate rt = new RestTemplate();
        ParameterizedTypeReference<List<User>> type = new ParameterizedTypeReference<List<User>>() {};
        // ResponseEntity:封装了返回值的信息
        ResponseEntity<List<User>> response = rt.exchange(sb.toString(), HttpMethod.GET,null,type);
        List<User> list = response.getBody();
        return list;
    }
}